Mr. wiggles is chosen among four vanity pets as a reward after completing a chain of Children's Week quests. Other rewards for the final quest include Whiskers the Rat, Speedy, and Scooter the Snail. Imperial Silkworm is found naturally from creating Imperial Silk using 8 Bolts of Windwool Cloth will yield a Silkworm Cocoon, which has a chance of dropping the Imperial Silkworm. Considering the randomness of this it might interest you to buy this pet from the Auction House. Ashstone Core was added with new battle pets in Patch 5.1 and it will drop off of Golemagg the Incinerator in Molten Core.
Disclaimer warning: This pet team is not completely tested and the strategy might not work with maximum stats. I have not obtained a battle stone for Mr. Wiggles or Imperial Silkworm that would upgrade them from uncommon to rare.
This team is very much high risk for high reward, a great number of attacks in the pet battle system have the subtext of "high chance to miss". This is my target for the proposal of this pet battle team, commonly do not like putting myself in a situation that would leave me with coin flip odds.
Now this poses an interesting situation with Blizzard's logic in calculating stats. This is what I think is actually happening when using the unique ability Uncanny Luck.
Mr Wiggles casts Uncanny Luck increasing the team's accuracy by 50%, then swap to a pet with a "high chance to miss" attack. Provided that the ability in question has effectively 50% chance to miss, traditional logic would mean that the two %'s would cancel each other out. The other option, which I think is actually happening here is that Mr Wiggles casts Uncanny Luck which brings the teams effective accuracy to 150%, and when you have a pet with a high chance to miss it effectively brings it down to 75%. Better than 50% but still a one in four chance to miss provided in the time you spend setting this up you have the potential to be hit four times before this "high chance to miss" attack lands.
Both Imperial Silk Worm , and Ashstone Core possess one these few "High chance to miss" attacks. Now a few other pets also have these same ones the reasons I settled on both Silk Worm and Ashstone Core was the abilities that came along with the package.
Imperial Silk Worm is a critter, in the current meta game of pet battles I personally do not see many beast type abilities. Also the fact that it also possesses both an attack to heal its health through "Consume", and one to dodge an incoming attack with "Burrow". The combination of these with what I'm aiming in this team fits in very well.
Ashstone Core isn't a similar situation, it does not have the same healing effect of the previous two pets , but still fits in the high risk nature of the team. Especially with the second slot ability to double the damage of the following attack, could lead to a quick KO of the opponents pet.
This team requires more testing and determining the hidden numbers behind the "high chance to miss" attacks. It could very easily be defeated by a team with pets to dodge attacks or those that would stun the pet for the period of Uncanny luck, again high risk for high reward.